返滴定法测定未知物中铝含量的实验改进.pdf

ISSN 1672- 4305 5 2009 10 CN 12 - 1352 /N LABORATORY SC IEN CE N o. 5 O ct. 2009 返滴定法测定未知物中铝含量的实验改进 孔德明, 李 一峻 (南开大学 分析科学研究中心, 天津 300071) : EDTA , , : : O 652. 1; O655. 25 : A : 1672 - 4 305 ( 2009) 05 - 0079 - 02 Im provem ent in the experim ent of detection of alum inum in unknow n sam ples by back titration m ethod KONG De- m ing, L I Y i- jun ( R esearch C entre for A nalytical Sc iences, N ankai U n iversity, T ianjin 300071, Ch ina) Ab stract: T he expermi ent eff iciency can be increased by adju sting the titration approach o f EDTA standard so lu tion. Su ch ad ju stm ent can elmi inate som e unnecessary step s includ ing apparatu s clean ing and rinsing. Key w ord s: back titration alum inum exp er mi ent mi provem ent 3+ A l EDTA , , [ 1- 2] , 1 [ 3- 7] [ 8 ] , , : EDTA , , EDTA , ED- , EDTA TA Zn2+ , 3 / 0 ( 1) 1 , , , 1mL ( 2) 2 , ( Re fe rences): 1, , OH - [ 1] 56. [ M ]. : , , , 1997. ( 3) 3 4 , [ 2] . (